Fish Oil vs Omega: Benefits, Dosage & What to Look For

Fish oil, omega 3, EPA, DHA; if you’ve ever turned over a supplement bottle and wondered what all those numbers and letters actually mean, you’re certainly not alone. For many of our customers, omega 3 is one of those supplements they know they should probably know more about.

It’s associated with heart health, brain function and everyday wellbeing, but knowing whether you need fish oil, algae omega 3 or a particular balance of EPA and DHA can make choosing a supplement feel more complicated than it needs to be.

The good news? Once you understand what you’re actually looking for on the label, choosing an omega 3 supplement becomes much simpler.

Here, we’re breaking down the difference between fish oil and omega 3, explaining the roles of EPA and DHA, how much omega 3 you may need, how to avoid that dreaded fishy aftertaste and what to look for when choosing the best omega 3 supplement for your daily routine.

What Is Omega 3?

Let’s start with the basics. Omega 3 is a family of essential fatty acids that play an important role in our health and wellbeing.

The three types you’ll hear about most often are:

• EPA (eicosapentaenoic acid): a long-chain omega 3 commonly found in oily fish and marine oils.
• DHA (docosahexaenoic acid): another long-chain omega 3, particularly important as a structural component of the brain and eyes.
• ALA (alpha-linolenic acid): a plant-based omega 3 found in foods such as flaxseed, chia seeds and walnuts.

Our bodies can convert a little ALA into EPA and DHA, but the conversion is limited and varies from person to person. This is why oily fish, fish oil supplements and algae-based omega 3 supplements are useful sources of EPA and DHA directly.

Fish Oil vs Omega 3: What’s the Difference?

The simplest way to think about it is that omega 3 is the nutrient, while fish oil is one source of that nutrient.

Fish oil is generally made from oily fish such as sardines, anchovies, mackerel or herring and naturally contains the omega 3 fatty acids EPA and DHA.

However, not every omega 3 supplement is fish oil.

Omega 3 can also come from algae, krill and plant foods, which means an omega 3 supplement may be suitable for someone who does not eat fish at all.

This distinction is particularly useful for our vegetarian and vegan customers. Marine algae can provide DHA and, depending on the formula, EPA too, offering a completely fish-free way to add long-chain omega 3 fatty acids to your routine.

So, when comparing fish oil vs omega 3, think of fish oil as one option within the much wider omega 3 family rather than two completely separate supplements.

EPA vs DHA: What Do They Actually Do?

EPA and DHA are usually the two numbers worth paying the closest attention to when shopping for omega 3 fish oil.

EPA

EPA is one of the main long-chain omega 3 fatty acids found in marine oils. Alongside DHA, it contributes to the normal function of the heart when consumed at appropriate levels.

It is also frequently studied in relation to inflammatory processes and wider cardiovascular health, although supplements should never be considered a replacement for prescribed medication or medical treatment.

DHA

DHA is particularly concentrated in the brain and retina.

DHA contributes to the maintenance of normal brain function and normal vision, making it an important part of a balanced diet throughout life. EPA and DHA together also contribute to normal heart function.

You’ll often find both in the same fish oil supplement, although the ratio can vary considerably from one formula to another.

What Are the Benefits of Omega 3 Fish Oil?

There’s a reason omega 3 benefits have become such a big part of the wellness conversation. EPA and DHA are involved in several important functions within the body, and adding them to your diet can be particularly useful if oily fish rarely makes it onto your weekly menu.

Supports Normal Heart Function

EPA and DHA contribute to the normal function of the heart. EFSA considers 250mg of EPA and DHA combined per day an adequate intake for general cardiovascular health in healthy adults.

That doesn’t mean taking more automatically gives you a “healthier” heart, though. Your wider lifestyle, including diet, movement, sleep, smoking status and medical history, matters too.

Supports Normal Brain Function

DHA is an important structural component of the brain and contributes to the maintenance of normal brain function.

This is one reason omega 3 frequently appears in supplements designed around healthy ageing, cognitive wellbeing and everyday nutritional support.

Supports Normal Vision

DHA also contributes to the maintenance of normal vision.

As with brain health, this doesn’t mean a fish oil supplement can treat an eye condition, but ensuring you get enough essential fatty acids can form part of a wider balanced diet and wellness routine.

Complements an Inside-Out Wellness Routine

At Face the Future, we’re big believers that looking and feeling your best involves more than what goes onto your skin.

Nutrition, hydration, sleep, stress, movement and the supplements you choose can all form part of the bigger picture. Omega 3 is often chosen by our customers who want to take a more rounded, inside-out approach to their long-term wellbeing.

Research into omega 3 and areas such as inflammatory balance, skin health and joint wellbeing continues to develop, but it’s important not to treat a fish oil supplement as a cure for a health or skin condition.

Fish Oil vs Algae Omega 3: Which Is Better?

If you eat fish and are comfortable taking a fish-derived product, a good-quality fish oil supplement can provide EPA and DHA in one convenient formula.

However, algae omega 3 is an excellent alternative for our customers who are vegan, vegetarian, have dietary preferences around fish or simply prefer a plant-based option.

Interestingly, algae is where the marine omega 3 story begins. Microalgae produce omega 3 fatty acids, which then move through the marine food chain. This means algae oil can allow you to go directly to the source.

Ultimately, fish oil is not automatically “better” than algae oil. What matters is the EPA and DHA supplied, the quality of the formula and whether you’re happy taking it consistently.

Three products we recommend include:

• Nordic Naturals Algae Omega 715mg, as it provides both EPA and DHA from marine algae, while also being third-party tested for purity and freshness.
• Another option is Cytoplan Omega 3 Vegan, a fish-free formula providing EPA and DHA from sustainably sourced marine algae.
• We also recommend to our customers Nordic Naturals Arctic-D Cod Liver Oil. Naturally flavoured with lemon, it offers a fresh taste while providing omega-3 fatty acids alongside vitamin D to support everyday wellbeing.

How Much Omega 3 Should You Take Each Day?

This is where supplement labels can become confusing.

A bottle might say “1000mg fish oil” in large letters on the front, but that does not necessarily mean you’re getting 1000mg of EPA and DHA.

The total fish oil and the amount of active omega 3 fatty acids are two different numbers.

For general adult wellbeing, EFSA has identified 250mg of combined EPA and DHA per day as an adequate intake for cardiovascular health. This can come from food, supplements or a combination of both; it does not mean everybody needs to take a 250mg supplement.

The NHS recommends eating at least two portions of fish per week, including one portion of oily fish, as part of a healthy balanced diet.

If you already enjoy salmon, sardines, mackerel or herring regularly, your dietary intake may be very different from someone who never eats fish.

Higher amounts of EPA and DHA are also sometimes used for specific clinical purposes, but this is where guidance from a doctor, pharmacist or suitably qualified healthcare professional becomes particularly important rather than simply increasing your supplement dose yourself.

Always follow the directions on your chosen product and avoid exceeding its recommended daily intake.

How to Choose the Best Omega 3 Supplement

There is no single best omega 3 supplement for every customer.

Your ideal formula will depend on your diet, how much EPA and DHA you want, whether you eat fish, the size of capsule you prefer and, importantly, whether you can actually see yourself taking it every day.

Here are the things we’d look at before adding one to your routine.

1. Look at EPA and DHA, Not Just “Fish Oil”

This is probably our biggest tip.

Instead of choosing the bottle with the largest “fish oil” number on the front, turn it around and check how much EPA and DHA you’re getting in the recommended serving.

Two supplements containing the same total amount of fish oil can supply very different amounts of EPA and DHA.

2. Check the Quality and Purity

Because marine oils can be exposed to environmental contaminants, quality control matters.

Look for trusted manufacturers that clearly explain how their oils are sourced, purified and tested. Third-party testing, screening for substances such as heavy metals or PCBs and testing for freshness can offer additional reassurance.

Advanced Nutrition Programme Omega 3 Fish Oil, for example, is screened for PCBs and other pollutants as part of its approach to purity.

3. Think About Freshness

Fish oil contains delicate fats that can oxidise, so freshness and storage are important.

Buy from a retailer you trust, check the expiry date and follow the storage guidance on the packaging. Keep your supplement away from heat and direct sunlight unless the manufacturer advises otherwise.

A very strong rancid smell or taste is different from the mild marine flavour you may naturally notice with fish-derived supplements.

4. Consider High-Strength vs Standard Formulas

A more concentrated formula can provide a higher level of omega 3 without requiring several capsules.

For example, Cytoplan Fish Oil High Potency Omega 3 offers a concentrated source of EPA and DHA from sardine and anchovy oil.

“High strength” isn’t automatically better, though. The right amount is the one that suits your individual needs and follows the product directions or advice you’ve been given.

5. Find a Formula You’ll Actually Enjoy Taking

A supplement only fits into your routine if you’re happy to take it.

If large capsules are your biggest issue, smaller softgels may feel much more manageable.

If it’s the fishy taste you dislike, flavoured oils and softgels can help. Nordic Naturals Ultimate Omega 2X Mini Strawberry, for example, combines smaller softgels with a natural strawberry flavour designed to make the experience more pleasant.

How to Stop Fish Oil Burps and Fishy Aftertaste

Yes, fish oil burps are a thing, and they can be enough to put some of our customers off taking omega 3 altogether.

Thankfully, there are a few simple ways to make your routine more comfortable:

• Take your fish oil with a meal rather than on an empty stomach.
• Look for lemon, strawberry or other naturally flavoured softgels.
• Try smaller capsules if large softgels feel heavy.
• Follow the product’s storage instructions carefully.
• Choose a formula from a manufacturer that tests for freshness and oxidation.
• If a particular supplement repeatedly causes reflux or digestive discomfort, consider trying another format rather than forcing yourself to keep taking it.

Taking fish oil alongside food can also make it easier to build into an existing habit: breakfast, lunch or dinner becomes your daily reminder.

What We Say…

“Taken consistently with meals, it is an easy addition to a daily routine. If you already take your other daily supplements with breakfast, add your omega 3 there. If dinner is the one meal you never forget, make that your reminder instead.

The best supplement routine is usually the one that fits naturally into the life you’re already living.”

Kimberley, Clinic Manager

When it comes to fish oil, we’d rather our customers choose a well-made formula they can take comfortably and consistently than simply chase the highest number on the bottle. EPA and DHA content, quality testing, dietary preferences and how easily the supplement fits into your day are all worth considering.

Who Should Speak to a Healthcare Professional Before Taking Fish Oil?

For many adults, omega 3 supplements can be a straightforward addition to a balanced diet, but there are situations where it’s sensible to get personalised advice first.

Speak to your GP, pharmacist, midwife or another appropriate healthcare professional if:

• You take blood-thinning or antiplatelet medication, or medication that could interact with supplements.
• You have a bleeding disorder.
• You are taking a particularly high-dose omega 3 product for a medical reason.
• You have an upcoming procedure and have been asked to review supplements or medication beforehand.
• You have a fish or seafood allergy and are considering a marine product.
• You are pregnant, trying to conceive or breastfeeding.
• You are choosing omega 3 for a child.
• You have an existing medical condition or are unsure whether a supplement is suitable alongside your current treatment.

Omega 3 supplements can interact with medicines, including anticoagulants, so your healthcare professional should know what you’re taking.

Fish Oil and Pregnancy

Omega 3, particularly DHA, is an important nutrient during pregnancy, but the type of supplement you choose matters.

The NHS specifically advises pregnant women not to take cod liver oil or supplements containing vitamin A in the form of retinol, as too much vitamin A can harm a developing baby.

This is an important distinction because regular fish oil and cod liver oil are not the same thing.

If you are pregnant or trying for a baby and want to add an omega 3 supplement, speak with your midwife, GP or pharmacist so they can help you choose an appropriate product and dose.

Fish Oil vs Cod Liver Oil: Are They the Same?

No. Both can contain omega 3, but they come from different parts of the fish and have different nutritional profiles.

Fish oil is generally chosen primarily for its EPA and DHA content.

Cod liver oil also naturally contains vitamins A and D. This can be useful in some circumstances, but it also means you need to pay closer attention to your total vitamin intake.

This is especially important during pregnancy, when NHS guidance advises avoiding cod liver oil because of its vitamin A content.

Can You Get Enough Omega 3 Through Food?

Absolutely, and food is always a great place to start.

The NHS recommends at least two portions of fish a week, including one portion of oily fish. Good sources of long-chain omega 3 include:

• Salmon
• Mackerel
• Sardines
• Herring
• Trout

Plant foods such as chia seeds, flaxseed and walnuts provide ALA omega 3 too.

Supplements simply offer another option for our customers who don’t regularly eat oily fish, prefer a more consistent daily intake or follow a vegetarian or vegan diet.

They should complement a varied, balanced diet rather than replace it.

Final Thoughts

Fish oil doesn’t need to be one of those supplements you buy because you’ve heard it’s “good for you” without really knowing why.

Understanding the difference between fish oil and omega 3, and knowing what EPA and DHA actually mean, makes choosing your supplement much easier.

Rather than getting distracted by the biggest number on the front of the bottle, look at how much EPA and DHA the formula provides, how its quality is tested and whether the capsule, liquid or algae-based alternative feels realistic for your everyday routine.

For some of our customers, that may mean a concentrated fish oil capsule. For others, it could be a smaller flavoured softgel to avoid the fishy aftertaste, or an algae-derived formula that fits naturally into a vegan lifestyle.

There is no single best omega 3 supplement for everybody. The best option is one that meets your nutritional needs, suits your lifestyle and can become an easy, consistent part of your wider wellness routine.

For even more ways to support energy, sleep, nutrition and inside-out wellbeing, explore our wider wellness supplements collection. Our expert-curated range is designed to make building a wellness routine that works for real life that little bit easier.

If you’re still unsure whether fish oil, algae omega 3 or another supplement is right for you, get in touch with our team of experts. We’re always happy to help you find products that feel right for your routine.